Multiple-voltage system of control.



R. P. JACKSON.

MULTIPLE VOLTAGE SYSTEM OE CONTROL.

APPLIGATIOX FILED MAR. 3, 1906 91 1 1 i Patented (M1126, 2909.

2 SHEETS-SHEET 1.

INVENTOR M KTTORNEY WITNESSES: am-a 50x4 COMOQO R. P. JACKSON.

MULTIPLE VOLTAGE SYSTEM OF CONTROL. APPLICATION FILED MAE. 3, 1906.

Q1 1 E Q Patented 5511.26, 1909.

2 SHEETSSHEET 2.

nnrrnn STATES PATENT OFFICE,

RAY P. JACKSON, or WILKINSBURG, 'PEnN'sYLviiniA,Assrenon To WESTINGHOUSE ELEC- rnro & MANUFACTURING oonraNY, A CORPQRATION or PENNSYLVANIA,

MULTIPLE-VOLTAGE OF CONTROL.

Specification of Letters Patent.

Eatented Jan. 26, 1909.

Application filed March 3, 1906. Serial No. 304:,02.

.Vilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement'in Multi le-Voltage Systems of Control, of which the ollowing is aspecification.

My invention relates to systems of control for electricali'translating devices and particularly to systems that are adapted to be supplied with either alternating or direct current and with alternating current at two or more voltages.

r The object of my invention is toprovide means whereby the circuits of the system may be adjusted automatically in accordance with the character and voltage of the current that is supplied thereto.

In the application of alternating current motors of the commutator type to the propulsion of railway vehicles, it has generally een found necessary to so construct the motors and arrange the circuits of the control system, that the vehicles may be operated by direct current over existing lines.

It has also been found expedient or necessary, in some instances, to su ply lower voltages to certain sections of t e distributing system thanto 0th sbecause of restrictions imposed by operati giconditions or 'by local ordinances. In such systems it hasbeen pro osed to employa s ecially constructed trol ey, that is preferab of the bow type,

for the collection ot'high voltage alternating current and to employ anordinary wheel trolley for the collection of low voltage alter nating current and direct currentl 'In an eceinber 18,1905, 1 have set forth a system in which the circuits are arrangedautomatically in a novel andlinpr'oved manner, in

accordance with the character of energy that is supplied thereto and in which manuallyoerated means are also provided, whereby die circuits of the system may be changed when the alternating voltage supplied to the system is changed- My present invention provides means whereby the circuits of such 'a system may be arranged automatically in accordance with the voltage supplied thereto. Figure 1 of the accompanying drawings is a diagrammatic view of a system that embodies my inventionand Fig, 2 is a simplified,

irgip'licatiomserial No. 292,234, filed byme adapted to occup diagrammatic view of the main circuits of the system shown-1n Flg. '1; i

The system comprises, as important ele ments, motors having armatures 1, 2, 3 and t and-field magnet windings 5, 6, 7 and 8 that are arranged," respectively, in series-conneoted pairs, a reversing switch 9 for gov swing the direction of rotation of the motors, a main transformer 10, a sub-dividcd resistance 11 that comprises sections 12, 13, l t-and 15, switches 16 to 27 inclusive where: by the active length of the main transformer 10, and the amount of the resistance 11 to be included in the motor circuits, may be varied and whereby the motor circuits may be otherwise adjusted, controlling magnet wind ings 28 to 39 inclusive for the switches; a change-over switch 40 that is interposed in the circuits of the magnet windings 28 to 39 inclusive for the purpose of governing the operation of the switches 16 to 27 inclusive and thereby causing the motor circuits to be adjusted in accordance with the character'of energy that is supplied to the system, an auxiliary resistance 41 in shunt to' which the magnet windings 28 to' 39 inclusive are adapted to be connected when the system is Supplied with direct current, an auxiliary transformer 42 from whichthe magnet wind ings 28 to 39 inclusive are supplied when operating by alternating current, master switches43 and 44 for'controlling the circuits of the magnet windings 28'to 39- inclusive and adapted to occupy positions indicated by broken lines a, b,'c, d, e and y, directioncontrolling switches45 and 46 for governing operation of the reversing switch 9- and broken linesf an r, a trolley collector 47 that may be of the bow type or otherwise especially constructed for the collection of high voltage alternating current and a trolley collector 48 of the ordinary wheel type or other structure for the collection of low voltage alternating current and direct current.

The reversing switch 9 is adapted to occupy one or the'other of the ositions indicated by the broken lines F an R corresponding, respectively, to forward and backward motion positions indicated by of the vehicle to which the system here shown other means, such as electro-pneumatic devices for eilecting itsoperation. The circuits of the magnet'winuings 53 and 54 are governed primarily by the nirection-control ling switches and 46 and secondarily by means of interlocking switches that comprise a set of stationary contact terminals 55, 56, 57, 58 and 59 and conducting segments 60 and 61 which are adapted to engage therewith and are carried by the reversing switch.

After the reversing switch has been moved to the one or the other of its positions by reason of the energization of the one or the other of magnet windings 53 and 54, the circuit of the magnet winding that has been utilized for .causi-ng such movement is interrupted by the interlocking switches and the circuit of the other magnet winding is arranged so that it may be established by operation of the direction-controlling switches 45 and 46. The

interlocking switches also serve to interruptthe circuits of magnet windings 29, 36 and 38 when the circuits of the system are-arranged for direct current operation and of magnet windings 35, 37, 38 and 39 when the circuits of the system are arranged for'operation by alternating current so that the corresponding switches 17, 24 and 26 in the one case and switches L3, 25, 26'and 27 in the other case cannot be closed for the purpose of establishing the motor circuits, except when the reversing switch occupies the one or the other of the positions indicated by the broken lines F and R. The manner in which the interlockingswitches thus control the circuits of these windings will be understood from a consideration of Fig. 1 when it is pointed out that one terminal of each of these magnet winnings is connected to stationary contact terminal 57.

The main switches 18 to 25 inclusive are provided, respectively, with interlocking switches 62 to 69 inclusive whereby the cir-- cults oi the magnet windings 28 to 39 1nclu-. sive are governed for the pur ose of preventing the main switches from c osing except in a predetermined order.

The change-over switch 40 is normally maintained n the position shown, 71. e., in the position iidicated by broken lines D.C, by means of a spring 70, in which position the circuits of the system are arranged for direct current operation, and it may be operated or caused to operate to the position indicated by 'the broken lines AC by means of a magnet winding 71, the circuits cf the system being then arranged for operation by alternating current. The magnet winding 71 is con-' nected between suitable points in the winding of the maintransformer 10 such, for example, as a point 72 and'the terminal 73 thereof that is connected by means of the vehicle wheels to the grounded track rail 7 4, so that the winding is ener ized when the main transformer is energized.

The trolley, collector 47 is adapted to be connected to theot-her terminal of the main transformer winding 10 and to engage a diS- tributing conductor 78 that may be supplied with high voltage alternating current from engage a conductor 82 in still another section of the system which may be supplied with low voltage alternating current, through a lowering transformer 83, from the source 79 or from any other suitable source; The switch lfise'rves to connect the trolley 48 and one terminal of the motor circuit to a suitable point '84 in the'transform'er 10, controlling magnet winning 48 of the sp itch being connected between a suitable point in the auxiliary transformer 42 and the grounded track rail 74.

Auxiliary resistance 41 and auxiliary transformer 42 are connected in series between the trolley 48 and the grounded track rail 7 4 so that when the trolley 4 is moved into engagement With the low voltage distributing conductor 82, the magnet winding 28 will be immediately energized and the switch 16 will close thereby connecting the trolley 48 to the point 84 in the main transformer 10.- 'lhe terminal of the magnet Winding 28 that is connected to the oint 85 in the auxiliary transformer 42, is a so connected to a stationary contact terminal 86 of the changeover switch 40, that is adapted to be engaged by a conducting segment 87 when the change-over switch occupies the position AC and be thereby connected to a stationary contact terminal 88 that is connected to' the point 7 2of the main transformer 10. It follows that when low voltage alternating current is supplied to the system, throu h the trolley 48, the magnet winding 28 will e energized immediately from the auxiliary transformer 42 and the main transformer 10 will thereupon be connected in circuit by means of switch -16, The change -'over switch will then be operated because of energizing otmagnet winding 71. However, when high voltage alternating current is sup, plied to the system, the change-over switch will be thrown immediately because of enerand 44. T e contact terminal 90 is adaptedlit than

to be connected to the point in the auxiliary transformer 42 and to the point 72 in the main transformer 10 by means of the conducting segment 87 when the change-over switch is moved to the position A'-C, and by means of conducting segment 91 to a suitable point 92 in the auxiliary resistance 41, when the change-over switch occupies position D-C. The magnet windings 29 to 39, inclusive, are therefore supplied with energy from either or both of the transformers 10 and 42, when the system is supplied with the alternating current, and theyv are connected in shunt to a portion of the resistance 41 when the system is supplied with direct current. The magnet windings 29 to 39, incln sive, are so constructed that but very small amounts of current are required'to energize them and the auxiliary resistance 41 and the auxiliary transformer 42 are so proportioned that when operating b" direct current, the greater portion of the ri iop of 'otential over the two devices will occur in he device 41, while, when 0" crating by alternatin current, practically al of the potential drop will occur in the transformer 42. Thus, the magnet windings for the individually actuated switches are supplied with direct current from't'he auxiliary resistance 41 and with alternating current from the auxiliary transformer 42. The mode of operation of this portion of the system is fully set forth in the application, Serial No. 292,234, above referred to, and since it forms ho part of my present invention, I do not deem it necessary to describe its operation further.

In order that the one or the other of the pairs of motors may be removed from service, upon the occurrence of an injury thereto, or for any other reason, cutout switches 94 and '95 are interposed in circuit with certain of the magnet windings 29 to 39, inclusive, in

such manner that, when the switch 94 is moved to the position shown in broken lines, the motors comprising armature; rand 2 and field magnet windings 5 and 6, will be removed from the circuit, and when the switch is moved to the position shown in broken lines, the motors comprising armature's 3- and 4 and field magnet windings 7 and 8 may be removed from the circuit. Since the cutout switches form no part of m present invention afid are-here illustrated only for the purpose of showing a complete, operative system, I deem it unnecessary to describe, in detail, the circuits in iiihich they are included.

state the conditions of the circuits which ex ist when one or the other of the master switches 43 and 44 occupies its respective positions for each position of the change-over switch. stood during the description by referring to Fig. 2. When the trolley 48 engages conductor 80, that is, when direct current is sup plied to the system, the change-over switch occupies the position shown and if one of the master switches is moved te the position a and the corresponding direction-controlling switch is moved to the position the reversing switch 9, if it does not already occupy that position, will be moved to the position The circuit that is established to effect the said movement of the reversing switch is from the point 92 iii the resistance 41 by way of devices bearing reference characters 91, 90, 43 Or 44, 45 or 46, 56, 61, 55, 53 and 73 to the ground at 74. U on movement of the reversing switch to position F, switches 17, 26 and 24 will be closed and the motors will be connected in series, with the resistance sections 12, 13, 14 and 15 in circuit. The circuits that are established to effect closure of the said switches are, respectively, as follows: by way of devices bearing reference characters 41, 92 91,90, 13 or 44, 45 or 46, 56, e1, 57, 102, 29, 62, 63, 64 and 74, from 57 by way of devices 103, 38 and 74, and from 57 byway of devices 102, 104, 36, 69, 67 and 74. As the master switch is moved through positions 1), c and d, the switches 18, 19 and 20 will be closed successively and the switches 17, 18 and 19 will open successively, thereby removing the resistance sections 12, 13 and 14 from the circuit. Vlhen the master switch is moved to position e, switches 20 and 21 will both be closed and the motors will be connected in series, with no resistance in cir- It the trolley 48 engages conductor 82, low voltage alternating current will be supplied to the system and magnet windings 28 and 71 will be immediately supplied with energy from the auxiliary transformer 42, whereupon the switch 16 will close'and' the changeover switch'4O will he moved to the position AC. Similar conditions will be estab lished in a manner which has been hereinbefore described when the trolley 47 engages conductor 78. If one of the master switches is then moved to the position a and the corresponding direction-controlling switch is will be thrown to the position F. Upon movement of the reversing switch to position F, switches 23, 25, 26 and 27 will be closed u I and the motors will be connected in series parallel relation between the track rail 74. and ti suitable low voltage point 190 in the main transformer 10. Upon movement the master switch to the position b the switch These circuits will be best underi system, and means whereby the translating 27 will open and switch 22 will close, whereupon the motors will be connected in the same relation as before but to a higher voltage point 1 01 in the main transformer 10 with resistance section 15 in circuit. When the master switcl'i is moved to the position 0, the

switch 21 is also closed and the resistance section 15 is removed from the circuit. Movement of the master switch to the position d causes the switch 19 to close and the switch 22 to open, the motors then being connected to a high voltage point 84 in the main transformer 10 with resistance section 14 in the circuit. hen the master switch is moved to the position 6 switch 20 closes and switch 19 opens, the resistance section 15 being thereby removed from the'circuit.

I claim as my invention:

1. In a system of control, the combination with translating devices that may be operated by either alternating or direct current, means ior'arranging the circuits of the system in accordance with the character of en that is supplied thereto but normally ect current operation, and means for automatically causing the same to arrange the oi cuits for alternating current operation l n alternating current is supplied to the system, of a transformer, a switch whereby the translating device may be connected thereto for alternating current operation, and means whereby the said switch. may be operated automatically when alternating current is supplied to the system.

2. In a system of control, the combination with translating devices that may be operated by either alternating or direct current, and a switch for arranging the circuits of the system in accordance with the character of energy that is supplied thereto, of a transformer, a switch whereby the translating device may be connected thereto for alternating current operation, and means whereby the said switches are operated automatically when alternating current is supplied to the system.

in a system of control, the combination with translating devices that may be operated by either alternating or direct current and means for arranging the circuits oi the system in accordance with the character of energy that is supplied thereto, or means for automatically causing the circuits to be arranged for alternating current operation when alternating current is supplied to the devices may be aut matically connected to a source of alternating current when alternating current is supp led to the system.

l. In a system of control, the combination with translating devices that may be'operated by either alternating or direct current, means for arranging the circuits of the sys- 1cm in accordance with the character oi rent and for high and low voltage alternating current, respectively, a transformer, a cur rent collector for high voltage alternating current that is connected to the transformer and another current collector for direct and for low voltage alternating current, of means .for automatically connecting the same to the transformer when alternating current is supplied to the system.

6. In a system of control, the combination with translating devices, distributing conductors for direct current and for high and low voltage alternating current, res ectivcly, a transformer, a-collector for nigh voltage alternating current that is connected thereto and a collector for direct current and for low voltage alternating current, of means for connecting the same and the translating devices to the transformer when alternating current is supplied to the system.

7. in a system of control, the combination with translating devices, distributing conductors for direct current and for high and low voltage alternating current, respectively I. a transformer, a collector for high voltage alternating current that is connected thereto and a collector for direct current and for low voltage alternating current, of means for connecting the same and the translating devices to the transformer when alternating current is supplied to the system, means for arranging the circuits of the system in accordance with the character of energy that is supplied thereto and means for causing the circuits to be arranged automatically in accordance with the character of energy that is supplied to the system.

8. In a system of control, the combination with a source of high and low voltage currents, and translating devices, of means for automatically connecting the translating devices to the said source regardless of the volta e supplied thereby.

9. ln a systemof control, the combinatlon with translating devices that may be operated by either alternating or direct current,

means for automatically arranging the circuits of the s'stem in accordance with the, character or energy that is sup-lied thereto, means whereby high and low vo time alternating current may be supplied to tie system and means whereby the same circult relations with reference to the transla ing devices will be established automatically regardless of the voltage that is supplied to the system.

10. In a system of control the combination with translatin devices that may be operated by either alternating or direct cur.-

rent, sources of supply of direct current and of high and low voltage alternating current, respectively, a main transformer and an auxiliary transformer, of a switch whereby the circuits of the system may be arranged automatically in accordance with the character of energy that is supplied thereto, overning means therefor that are supplied from the main transformer, a switch whereby the translating devices may be connected to the main transformer and overning means therefor that ma be supp%ied from either or both the auxi 'ary and the main transformer; v

11. In a system of control, the combination with translating devicesthat may be operated by either alternating or direct current, sources of supply of direct current and of high and low voltage alternating current, respectively, a main transformer and an auxl iary transformer, of a switch whereby the circuits of the system may be arran ed automatically in accordance with the c aracter of energy that is supplied thereto, governing means therefor that are supplied from the main transformer, means whereby the translating devices may be connected to the main transformer and governing means therefor that may be supplied from either the auxiliary or the main transformer or fromboth of them.

In testimony whereof, I have hereunto subscribed my name this 24th day of February, 1906.

RAY P. JACKSON. Witnesses:

R. B. INGRAM, BIRNEY Burns. 

